ZETRON CellPhone Detector Plus User manual
WARRANTY
Zetron warrants that all equipment manufactured by or sold under Zetron label is
free from defects in material and workmanship at the time of shipment. For your
convenience, Zetron may purchase and supply items manufactured by others.
This will be disclosed to you. In these cases other warranties may apply. Consult
with Zetron for specific details. Zetron’s warranty extends one year from date of
shipment and covers parts and labor. Buyer must provide written notice to Zetron
within the warranty period of any defect. If the defect is not the result of improper
use, service, maintenance or installation, and if the equipment has not been
otherwise damaged or modified after shipment, Zetron shall either replace or repair
the defective parts or replace the equipment or refund the purchase price at
Zetron’s option, after return of such equipment by buyer to Zetron. Shipment shall
be paid for by the buyer. No credit shall be allowed for work performed by the
buyer. Equipment found to be not defective shall be returned at buyer’s expense
and testing and handling expense shall be borne by the buyer. Out-of-warranty
repairs will be invoiced at the current Zetron hourly rate plus the cost of needed
components.
LIMITATION OF LIABILITY
Zetron makes no representation with respect to the contents of this document
and/or the contents, performance, and function of any accompanying software and
specifically disclaims any warranties, expressed or implied, as to merchantability,
fitness for purpose sold, description, or quality.
Further, Zetron reserves the right to revise this document or the accompanying
software and to make changes in it from time to time without obligation to notify
any person or organization of such revisions or changes.
This document and any accompanying software are provided “as is.” Zetron shall
not under any circumstances be responsible for any indirect, special, incidental, or
consequential damages or losses to the buyer or any third party arising out of or
connected with the buyer’s purchase and use of Zetron’s products or services.
1
INTRODUCTION
The CellPhone Detector Plussenses the radio frequency (RF)
transmissions from nearby cellular telephones, personal
communication service (PCS) phones, two-way radios, and
other wireless communication devices. When a transmission is
detected, an “Alarm” cycle begins that includes a voice
message requesting users to turn off their communication
devices.
Because the sensitivity of the CellPhone Detector Plus is fully
adjustable and the unit can be powered by an AC adapter or
batteries, and many features can be switched on or off as
needed, the CellPhone Detector Plus can be adjusted to suit
almost any facility or application. In addition, the Alarm Output
and Audio Output on the CellPhone Detector Plus can be used
to generate remote alarms and extend alarm messages into
other areas.
This guide provides detailed information about the CellPhone
Detector Plus. For best operation, please carefully read all the
information in this guide prior to using or installing the unit.
OVERVIEW
Studies show that many types of sensitive electronic
equipment malfunction when exposed to radio energy. Any
common transmitter, such as a cellular telephone or two-way
radio, emits this energy.
Many healthcare institutions, utility company control rooms,
and manufacturing organizations have already moved to ban
cellular phones, PCS and other wireless radio transmitters
throughout their facilities. Others restrict transmissions near
particularly sensitive equipment.
The CellPhone Detector Plus helps enforce such policies by
constantly monitoring for the presence of cellular phone, PCS
and two-way radio transmissions. When a transmission is
detected, an alarm sounds. The alarm consists of an audio
message (beeps plus voice) and a bright red flashing light.
2
When the transmitter is turned off or moves outside the
coverage area of the CellPhone Detector Plus, the alarm
sequences end.
TYPICAL APPLICATIONS
In addition to guarding against interference effects from hand-
held transmitters, the CellPhone Detector Plus can also help
enforce restrictions designed to eliminate eavesdropping. This
can be unintentional transmissions in secure areas as well as
intentional abuses.
The following typical applications describe the recommended
placements and threshold settings for the CellPhone Detector
Plus.
Small to Medium Size Room
In a small control room, hospital room, or meeting room, place
the CellPhone Detector Plus close to the sensitive equipment,
but away from outside windows.
Set the threshold to MEDIUM.
Sensitive Equipment
If a specific piece of equipment is susceptible to radio
transmissions, place the CellPhone Detector Plus on that piece
of equipment, a nearby wall or the cart that carries the
equipment.
Set the threshold to NEAR or MEDIUM.
Large Areas
If placed in the center of a large area, a single CellPhone
Detector Plus can monitor an area up to 15 by 15 meters. For
some large areas, it may be necessary to use multiple
CellPhone Detector Plus units to obtain complete coverage.
Set the threshold to FAR.
Hallway to Critical Area
When the CellPhone Detector Plus is used to monitor a large
3
critical area and/or multiple pieces of equipment, place an
additional CellPhone Detector Plus in the hallway leading to
the area.
Set the threshold to NEAR.
FEATURES & CONTROLS
The features and controls you need to be familiar with are
shown below.
AC
ALERT
TEST/
MUTE
4
1. GRILLE PANEL This removable panel covers the user
adjustments and protects the alarm
speaker.
2. POWER ON/OFF This switch turns the unit ON when
ready for use.
3. FOUR-
POSITION DIP
SWITCH
There is a set of four DIP switches
located above the ON/OFF switch.
These switches, in order from left to
right, control the following functions:
VOICE I/O:
UP: The alarm is a series of beeps
followed by a voice message. This is
useful when self-enforcement is
desired.
DOWN: The alarm consists of beeps
only. Useful to alert facilities
personnel.
PWR-SPK:
UP: The speaker in the unit sounds
when in alarm mode.
DOWN: Silences the speaker. This is
useful if only a flashing light is desired
or if the remote alarm or audio output
is being used.
Note: Regardless of the position of
this switch, the audio alarm will output
through the audio jack on the side of
the unit.
5
3. FOUR-POSITION
DIP SWITCH
(continued)
FLASH:
UP: The ALERT LED flashes during
each alarm cycle.
DOWN: The ALERT LED does not
flash during alarms. This is useful if
the remote alarm output is being used
and it is desired the unit be as
unobtrusive as possible.
AUTO-REG:
UP: In addition to its normal operation,
the CellPhone Detector Plus will
recognize and alarm on short duration
radio transmissions such as cellular
telephone registration signals. See
“Auto-Registration ...” on page 9 for
more details on the operation of this
function.
DOWN: The Auto-Registration mode
is not activated and short duration
transmissions are ignored.
4. SENSITIVITY
ADJUSTMENT This adjustment controls the coverage
area in which the CellPhone Detector
Plus will detect transmissions. When
set at NEAR, for a typical cellular
phone, the detection range is 1-2
meters. When set at FAR the typical
detection range is 20 to 30 or more
meters.
5. ALARM VOLUME This adjustment controls the volume
of the audio alarm.
6. SPEAKER
GRILLE This black cloth protects the speaker
behind it. Do NOT press or poke this
cloth.
6
7. ALERT LIGHT During an alarm, this light blinks very
brightly. During non-alarm conditions
a shorter, dimmer “wink” occurs
periodically (every 18 to 24 seconds)
to indicate the unit is ON and working
properly.
8. TEST/MUTE When the CellPhone Detector Plus is
in a non-alarm state, pressing this
button simulates an alarm condition
and activates the alarm. This is useful
for checking the integrity of the unit
and the volume setting.
During an alarm, pressing this button
puts the CellPhone Detector Plus into
an audio alarm mute mode that lasts
for 90 seconds. Pressing this button
while the CellPhone Detector Plus is
in the mute mode reactivates the
audio alarm.
9. AC LIGHT When an external power source,
normally an AC wall adapter, is in use
this light will light when the CellPhone
Detector Plus is ON. During battery
operation the light will not be on.
10. AUDIO OUT See “Outputs” on page 7 for more
details.
11. ALARM OUT See “Outputs” on page 7 for more
details.
12. DC POWER
JACK This requires 9 to 12 volts DC with
300 mA minimum.
7
NOTE
If the alarm has been sounding continuously for more than
90 seconds the CellPhone Detector Plus automatically
enters a Mute Mode in which the audio is silenced and, if
the FLASH switch is UP, the only indication of an alarm is
the front panel flashing light. The Mute Mode lasts for
about 90 seconds but can be canceled by simply pressing
the TEST/MUTE button.
OUTPUTS
The CellPhone Detector Plus has two outputs: audio and
alarm. Both output jacks are located on the side of the unit.
For a more robust connection there is a screw-terminal strip
near the battery holder inside the unit. See the diagram below.
Terminal Strip Location
++
+ +-
- -
-
ALARM
OUT GND AUDIO
OUT
8
Alarm Output
The Alarm Output can be used to remotely alert personnel to
an on-going alarm. For example, this output could be wired
back to a security office, nurse’s station, control room, or
trigger an external alarm system.
The Alarm Output is an open collector transistor. When no
alarm is in progress the output impedance is very high. When
an alarm is on-going, the output goes into a low impedance
state of 66 ohms.
Even if the RF signal has terminated prior to the end of the
alarm message, the Alarm Output stays in the low impedance
state for the entire length of the alarm message. At the end of
the message the CellPhone Detector Plus checks to see if an
RF signal is still present. If no RF signal is present the alarm
output returns to the high impedance state. This allows the
alarm output to be used as a trigger to count the number of
times RF has been detected as well as an indicator for the
length of time the alarm has been active.
Alarm Output
Connector 2.5 mm mono-audio jack, tip is
output, sleeve is ground
Maximum external
applied voltage 24 volts
Maximum continuous
current sink 10 mA
Audio Output
The Audio Output can be used to input the alarm directly into a
public address system, extend the alarm so that it can be
heard from several locations, or amplify the audio for
excessively noisy areas.
When the audio jack is in use, the audio message can still play
through the unit’s speaker. The internal audio amplifier,
however, is not used with the audio out.
9
Audio Output
Minimum load
impedance 16 ohms
Audio output DC coupled
Connector 2.5 mm mono-audio jack, tip
is output, sleeve is ground
If the audio out load impedance is at the minimum (16 ohms)
some decrease in volume at the speaker within the unit can
occur. To avoid this, connect the audio out to a load of several
hundred ohms.
AUTO-REGISTRATION AND OTHER SHORT
TRANSMISSIONS
Cellular telephones communicate with the cellular network by
sending short duration transmissions to identify their location
within the network. These transmissions are called
Auto-Registration signals and can occur anytime the cellular
phone is ON.
For analog cellular phones these Auto-Registration signals
occur about every 30 minutes and last for only about 125 ms.
When a cellular phone is turned on it checks an internal
counter to see when it last sent this signal. Only if 30 minutes
has passed, or the phone has moved into a new cell, will the
cellular phone emit an Auto-Registration signal within the next
few seconds.
Cellular phones that use one of several digital formats as well
as PCS phones may register less often than an analog phone.
Some only register at the time the phone is turned off. Also,
cellular phones respond when they are paged for an incoming
call. They do this by sending out a short message similar to a
registration signal. This tells the cellular network that the phone
is ready to take a call and a ring sequence begins.
10
INSTALLATION
If the CellPhone Detector Plus is to be battery operated or
battery backed-up AC power is desired; prior to putting the unit
into service, install the batteries (not included). See “Battery
Replacement” on page 13.
Placement
To make the unit easily visible to room occupants, place the
CellPhone Detector Plus about 2 meters above the floor. This
will also help avoid unwanted impacts to the unit.
For some applications it is desirable for the CellPhone
Detector Plus to be as unobtrusive as possible. If this applies
to your application, then it may also be desirable to turn off the
Flashing LED on the front of the unit and use the remote Alarm
Output.
For more information about placement, see “TYPICAL
APPLICATIONS” on page 2.
Mounting
Mount the CellPhone Detector Plus on any non-metallic
surface or place it upright on a shelf or similar structure.
WARNING
Mounting the CellPhone Detector Plus on or very near
metal surfaces can significantly reduce the coverage area.
Use 1-inch (2.54 cm) long, #6 (3.5 mm) screws. Be sure the
screws being used are appropriate for the mounting surface.
Drill two holes spaced 7116 inches (17.95 cm) apart and
install two mounting screws. Leave the screw heads extended
about 14inch (6.35 mm) above the mounting surface.
11
If mounting the CellPhone Detector Plus to drywall, plastic
anchors should be used. Press the plastic anchors into the
holes until fully seated. Turn each screw until the anchor is
tightly expanded. Leave the screw head exposed about
14inch (6.35 mm) for mounting.
ACTIVATION
After installing batteries in your CellPhone Detector Plus or if
an external power supply is to be used, remove the trim panel
on the front and make the following adjustments. See the
diagram on page 3for switch locations. See “Battery
Replacement” on page 13 for instructions on installing the
batteries.
1. Move the POWER OFF/ON switch to the ON position.
2. Move the VOICE I/O DIP switch to the UP position to
enable the voice alarm message or to the DOWN position
for a beeps-only alarm. This is the left-most switch on the
DIP switch located above the ON/OFF switch.
3. Adjust the threshold setting with a small screwdriver. This
is factory-set to an intermediate distance.
Note
Unwanted alarms may indicate that the threshold
adjustment should be moved closer to NEAR. This will
prevent transmitters outside of the intended coverage
area from activating the alarm.
4. To set the alarm volume, press the TEST/MUTE button
and listen to the alarm. While the alarm plays, adjust the
VOL LOW/HI control to a satisfactory level using a small
screwdriver.
5. Other adjustments that can be made are Speaker Audio,
Flashing Light, and Auto-Registration Mode. These are
discussed in more detail in ”Features and Controls” on
12
page 3.
This completes the electrical adjustments of your CellPhone
Detector Plus. After a few days or weeks of use, you may wish
to modify the threshold and volume settings.
BATTERIES
Four C-size alkaline batteries will power the CellPhone
Detector Plus for a minimum of 1 year, assuming 5 alarms per
day. Batteries are not included.
Note
Battery life will be considerably reduced if the
Auto-Registration Mode is activated.
Low-Battery Conditions
When the charge in the batteries is low, the CellPhone
Detector Plus will sound a low battery alert consisting of single
brief beep or tone approximately every 6 minutes.
Once the low battery chirps have started, the unit will continue
to operate for at least 1 week. During this time you should
replace the batteries. If the alert light ceases to blink every 18
to 24 seconds, then the unit has shut down completely due to
lack of battery power.
If the CellPhone Detector Plus is operated using an external
power source, the low battery alarm will not operate unless the
external power source is disconnected.
13
Battery Replacement
1. Remove the front trim panel by gently pulling forward on
each of its ends. Slide the power switch to OFF.
2. If mounted on a wall, remove the CellPhone Detector Plus
from the wall (lift it up, then away).
3. Locate the four back cover screws and remove them.
4. Remove the back cover, and replace the four batteries
according to the polarity diagram in the battery case.
5. Re-secure the back cover and re-install the unit.
6. Turn the power switch to ON and re-attach the trim panel.
7. Verify that the unit is working normally by pressing the
TEST/MUTE button. The alarm should sound.
14
EXTERNAL DC POWER
The CellPhone Detector Plus can be powered by an external
DC source of 9 to 12 volts and a minimum of 300 mA.
Typically this will be an AC wall adapter.
When an external DC source is used, batteries should still be
installed for emergency back-up. If the external power fails or
is removed, the CellPhone Detector Plus automatically
switches over to battery power.
SPECIFICATIONS
Weight, Size 0.4 kg, 20(W)×11.2(H)×5(D) cm
Frequency Response 400–2000 MHz
optimized for 810–1950 MHz
Detection Distance 2–17 m (minimum), line-of-sight; user
adjustable
20–30 m typical
Alarm Message Pre-recorded at factory, English is
standard. Other language options are
available.
Batteries
(not included) 4 "C" cells, alkaline
Battery Life Minimum 1 year, with 5 voice
alarms/day
Low-Battery Alarm Sounds one beep or tone every
6minutes for 1 week, minimum
Alarm Volume 94 dB max., A-weighting at 1 m
External Power 9-12 VDC, 300 mA
External Alarm
Output Open collector, 24 volts max. applied
voltage; connector: 2.5 mm mono
jack
External Audio Output Minimum load is 16 ohms; connector:
2.5 mm mono jack
15
TROUBLESHOOTING
PROBLEM POSSIBLE SOLUTIONS
The CellPhone Detector Plus
is not alarming on
transmissions.
Insufficient sensitivity;
turn the threshold setting to
FAR.
The cellular phone may not
actually be transmitting. See
“Auto-Registration ...” on
page 9.
Unit may be mounted to a
metal surface. Move it to a
non-metal location.
Unit is not powered up. Turn
on the power switch and press
the TEST/MUTE button.
Batteries are not installed or
have insufficient power.
Replace the batteries or use
an external DC power source.
The CellPhone Detector Plus
is alarming to transmissions
outside the intended coverage
area.
The sensitivity is set too high.
Turn the threshold setting
closer to NEAR.
The CellPhone Detector Plus
may be responding to cell-
phones or other transmitters
located outside the building or
on an adjacent floor. Re-
locate the unit.
CellPhone Detector Plus is
beeping upon alarm, but there
is no voice warning.
Move the VOICE I/O switch to
the UP position.
LED gives off a short blink
about every 24 seconds. This indicates the CellPhone
Detector Plus is turned on and
operating properly.
16
PROBLEM POSSIBLE SOLUTIONS
Audio alarm is too loud or too
soft. Adjust the volume setting.
Press the TEST/MUTE button
to sound the alarm during
adjustment.
Sound is too soft or distorted,
even when the volume is set
too high.
Replace the batteries or use
external DC power.
Upon alarm the light flashes,
but there is no audio Move the PWR-SPK switch to
the UP position.
The Alert LED does not flash
during an alarm. Move the FLASH switch to
the UP position
Unit sounds a single beep
about every 6 minutes. Batteries are low and need
replacement.
My cellular phone is on, but
the CellPhone Detector Plus
is not alarming.
The CellPhone Detector Plus
only alarms when a cellular
phone is transmitting. Please
see “Auto-Registration ...” on
page 9 for details about how
cellular phones and cellular
systems operate.
If you experience a unique symptom, please contact your local
Zetron sales representative.
If the local representative is unable to resolve the problem,
then contact Zetron product support at (425) 820-6363 and ask
for technical assistance for the Model 510 CellPhone Detector
Plus or send an email for Model 510 technical support to
Table of contents
